Leroy Claude C, Robinson Stephen P, Goldsmith Mike J
IMM Vivaldi, 30 Chemin de la Baou, 83110 Sanary sur Mer, France.
J Acoust Soc Am. 2008 Nov;124(5):2774-82. doi: 10.1121/1.2988296.
A new equation is proposed for the calculation of sound speed in seawater as a function of temperature, salinity, depth, and latitude in all oceans and open seas, including the Baltic and the Black Sea. The proposed equation agrees to better than +/-0.2 m/s with two reference complex equations, each fitting the best available data corresponding to existing waters of different salinities. The only exceptions are isolated hot brine spots that may be found at the bottom of some seas. The equation is of polynomial form, with 14 terms and coefficients of between one and three significant figures. This is a substantial reduction in complexity compared to the more complex equations using pressure that need to be calculated according to depth and location. The equation uses the 1990 universal temperature scale (an elementary transformation is given for data based on the 1968 temperature scale). It is hoped that the equation will be useful to those who need to calculate sound speed in applications of marine acoustics.
提出了一个新的方程，用于计算所有海洋和公海（包括波罗的海和黑海）中海水声速与温度、盐度、深度和纬度的函数关系。所提出的方程与两个参考复方程的吻合度优于±0.2米/秒，每个参考复方程都拟合了与不同盐度的现有水体相对应的最佳可用数据。唯一的例外是在某些海域底部可能发现的孤立热卤水点。该方程为多项式形式，有14项，系数为一到三位有效数字。与使用需要根据深度和位置计算的压力的更复杂方程相比，这在复杂性上有了大幅降低。该方程使用1990通用温度标度（给出了基于1968温度标度的数据的基本变换）。希望该方程对那些在海洋声学应用中需要计算声速的人有用。
